<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
    
        .box{
            width: 140px;
            height: 140px;
            background-color: gold;
            padding: 20px;
            border: 10px solid #000;
        }
    
    </style>
</head>
<body>

    <!--盒子模型 宽高
    
        宽= width + padding左右 + border左右
        高= height + padding上下 + border上下
    
    -->
    <div class="box">

        小苹果牵醒醒好温馨
    </div>

    
</body>
</html>